/**
 * Copyright 2011 FeedDreamwork SIG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.feeddreamwork.ui;

import java.io.*;
import java.util.*;

import javax.servlet.http.*;

import org.feeddreamwork.*;
import org.feeddreamwork.pubsubhubbub.*;

import com.google.appengine.api.users.*;

public class AddFeedServlet extends HttpServlet {
	@Override
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws IOException {
		req.setCharacterEncoding("UTF-8");
		resp.setContentType("text/html; charset=UTF-8");
		resp.setCharacterEncoding("UTF-8");

		UserService userService = UserServiceFactory.getUserService();
		String feedId = req.getParameter("feedid");
		FeedInfoRepository feedInfoRepo = new FeedInfoRepository();
		try {
			FeedInfo feedInfo = feedInfoRepo.getFeedInfo(feedId);
			if (feedInfo != null) {
				resp.getWriter().write("对不起，此Feed地址已被占用!");
				return;
			}

			feedInfo = new FeedInfo(feedId, Integer.parseInt(req
					.getParameter("frequency")),
					req.getParameter("targettype"),
					userService.getCurrentUser(), Arrays.asList(req
							.getParameter("processors").split("\r\n|\n")));
			feedInfoRepo.saveObject(feedInfo);

			try {
				PSHBUtils.subscribe(ApplicationProperty.HOST_NAME + "/feed/"
						+ feedInfo.getFeedId());
				FeedResultCache.put(feedInfo);
			} catch (Exception e) {
				Utils.throwIfDevelopment(e);
				resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
				return;
			}
			resp.sendRedirect("/feed/" + feedInfo.getFeedId());
		} finally {
			feedInfoRepo.close();
		}
	}
}
